Foundation
design must consider the soil's bearing capacity to safely support structural
loads. Therefore, an analysis is required to compare pile configurations in
terms of bearing capacity, settlement, and pile efficiency, based on an
analytical approach using the Vesic method and Allpile.V7 software. The planned
configurations are PC 6 (2X3), PC 16 (2X8, 4X4), and PC 70 (50) (2X28, 4X14,
7X8) with spacing variations of 150 cm, 180 cm, and 210 cm.
This
study uses a quantitative approach with a comparative method. The selected methods
are expected to approximate the values calculated using Allpile software.
Several methods were used, including the Vesic method (1970) to calculate the
pile tip bearing capacity (Qp) and pile settlement, and the Brom method to
calculate the pile side bearing capacity (Qs).
The comparison of the ultimate bearing
capacity of single piles yielded a difference of 1,63%. Furthermore, pile
efficiency calculations using the block approach yielded results closer to the
AllPile output values than
those using the individual approach. At a pile axis-to-axis distance of 180 cm,
the efficiency value increased, thus affecting the group bearing capacity.
Meanwhile, calculations of single and group pile settlement yielded a constant
difference of 17,3% across all configurations. Based on the largest group
bearing capacity and the smallest group settlement, the best and most efficient
configurations were PC 6 2X3, PC 16 2X8, and PC 70(56) at a spacing of 150 cm.
Keywords : Foundation design, Pile
configuration, Vesic Method (1970), Brom Method, Bearing capacity, Pile
efficiency, Pile settlement